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GFK-0825F Chapter 4 Operation 4-15
4
Synchronous Operation of a BIU and a Micro Field Processor
Read all inputs from conventional
destination is the BIU, except groups
Read all reference parameter inputs from
“smart” modules
Read all group data moves whose
whose source is a Synchronization module
Send Group Data moves
to a Synchronization module
Send outputs from BIU
to Synchronization modules
Move all inputs within BIU network map
from BIU tables to the Genius
communications buffers
Move all outputs within BIU network
map from the Genius communications
buffers to the BIU internal tables
Read all reference input parameters from
a Synchronization module
Read all group data to the BIU
from a Synchronization module
Send all outputs to conventional modules
Send all reference parameter outputs to
“smart” modules, but not to
a Synchronization module
Send all group data to all “smart”
modules except a Synchronizarion module
Background Tasks
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7
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discrete and analog input modules
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*
*
*
*
* Group Data is moved only
during its configured BIU sweeps.
MFP receives data from the BIU
and places the data in its input tables
MFP receives Group Data
from the BIU
MFP provides data from its
output tables to the BIU
MFP Waits
MFP Waits
MFP places received data into its
configured memory locations
MFP solves its program logic
utilizing newly-received data
MFP “BUSY”
MFP updates its
configured memory locations
BIU Waits if
MFP is busy
MFP provides group data
to the BIU
Micro Field Processor
Bus Interface Unit
The tasks shown in shaded boxes are
performed only if the I/O Station includes a
Synchronization module. The Synchronization
module is usually a Micro FIeld Processor.
MFP Waits
MFP Waits